Microwave-assisted synthesis method of nano fluorapatite powder

A fluoroapatite powder and microwave-assisted technology is applied in the synthesis field of nano-fluoroapatite powder and can solve the problems of complex process, high energy consumption, long reaction period and the like

Inactive Publication Date: 2014-02-12
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the defects of the prior art, the present invention provides a simple and efficient method for rapidly synthesizing nano-fluoroapatite powder using microwave technology, so as to overcome the problems of long reaction period, complicated process and high energy consumption in the prior art. defect

Method used

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  • Microwave-assisted synthesis method of nano fluorapatite powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Dissolve 4.723 g calcium nitrate tetrahydrate in 50 mL water to make a concentration of 0.4 mol L -1 Calcium ion solution; 1.585 g diammonium hydrogen phosphate and 0.333 g ammonium fluoride were dissolved in 50 mL water to make a concentration of 0.24 mol L -1 Phosphate and 0.18 mol·L -1 A mixed solution of fluoride ions;

[0023] (2) Pour the mixture of calcium ions, phosphate and fluoride ions in step (1) into a three-necked flask. The pH of the reaction system is the natural pH of the mixture, and the reaction temperature is 60°C. Under stirring conditions, microwave synthesis for 30 min;

[0024] (3) When the temperature of the system dropped to room temperature after the reaction, the product was separated by centrifugation, washed three times with distilled water, dried in an oven at 80 °C for 12 h, and ground to obtain nano-fluoroapatite powder.

Embodiment 2

[0026] The preparation steps are the same as in Example 1, except that the temperature of the water bath in step (2) is changed to 40° C. to obtain nano-fluoroapatite powder.

Embodiment 3

[0028] The preparation steps are the same as in Example 1, except that the temperature of the water bath in step (2) is changed to 20° C. to obtain nano-fluoroapatite powder.

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Abstract

The invention relates to a microwave-assisted synthesis method of nano fluorapatite powder. The microwave-assisted synthesis method of the nano fluorapatite powder is characterized by comprising the following steps: dissolving 4.723g of calcium nitrate tetrahydrate into 50ml of water to prepare a calcium ion solution with the concentration of 0.4mol / L; dissolving 1.585g of diammonium hydrogen phosphate and 0.333g of ammonium fluoride into 50ml of water to prepare a mixed solution of phosphate with the concentration of 0.24mol / L and fluorine ion with the concentration of 0.18mol / L, pouring the calcium ion solution, and the mixed solution of phosphate and fluorine ion into a three-necked flask, carrying out microwave synthesis for 30 minutes under the conditions of condensation refluxing and strong magnetic stirring, and carrying out centrifugal separation, washing, drying and grinding on products, thus the nano fluorapatite powder is obtained, wherein pH of a reaction system is natural pH of the mixed solution and a reaction temperature is 60 DEG C. The nano fluorapatite powder prepared by adopting the microwave-assisted synthesis method of the nano fluorapatite powder has high crystallinity and high purity. The microwave-assisted synthesis method of the nano fluorapatite powder is simple and feasible and low in cost, pH does not need to be regulated in a reaction process, reaction rate is high, low-temperature synthesis can be realized, and industrialization can be easily realized.

Description

technical field [0001] The invention belongs to the technical field of artificial synthesis of natural minerals, in particular to a method for synthesizing nano fluorapatite powder. Background technique [0002] Hydroxyapatite (Ca 10 (PO 4 ) 6 (OH) 2 ) is the basic inorganic component of hard tissues such as mammalian bones and teeth, so it is widely used as a hard tissue substitute material. However, due to the poor acid resistance and high solubility of hydroxyapatite in aqueous solution, fluorapatite (Ca 10 (PO 4 ) 6 f 2 ) have unique advantages. Therefore, due to its good biocompatibility and bioactivity, fluoroapatite has gradually become a kind of enamel regeneration material and bioceramic material with broad application prospects. This is especially true for nanofluoroapatite materials. [0003] Apatite is the most common phosphate mineral on the earth, and fluorapatite is the most common natural apatite ore, but due to the influence of isomorphic substitu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/455B82Y40/00
Inventor 吴柳明马先慧盛永丽马安良齐长林孙中溪
Owner UNIV OF JINAN
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